ss2tf (Signal Processing Toolbox)

Conversion of state-space to transfer function.

Syntax

[b,a] = ss2tf(A,B,C,D,iu)

Description

ss2tf converts a state-space representation of a given system to an equivalent transfer function representation.

[b,a] = ss2tf(A,B,C,D,iu)

returns the transfer function

of the system

from the iu-th input. Vector a contains the coefficients of the denominator in descending powers of s. The numerator coefficients are returned in array b with as many rows as there are outputs y. ss2tf also works with systems in discrete time, in which case it returns the z-transform representation.

The ss2tf function is part of the standard MATLAB language.

Algorithm

The ss2tf function uses poly to find the characteristic polynomial det(sI-A) and the equality

See Also


`latc2tf`	Lattice filter to transfer function conversion.
`sos2tf`	Conversion of second-order sections to transfer function.
`ss2sos`	Conversion of state-space to second-order sections.
`ss2zp`	Conversion of state-space to zero-pole-gain.
`tf2ss`	Conversion of transfer function to state-space.
`zp2tf`	Conversion of zero-pole-gain to transfer function.

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